Strategist warns AI investment bubble is inevitable, advises caution

TS Lombard, a market strategist, has stated that the current investment enthusiasm around artificial intelligence (AI) represents a bubble that is bound to burst at some point, according to MarketWatch.

The strategist emphasized that investors should not attempt to predict the exact timing of the bubble's collapse, suggesting that doing so could be unproductive or risky.

Instead, the advice is to prepare for the eventual downturn in the AI investment theme, though specific strategies for preparation were not detailed in the report.

This perspective adds to ongoing discussions about the sustainability of high valuations in AI-related stocks and the potential risks for investors.

MarketWatch reported these insights as part of their top stories on October 26, 2026.